While the car assembly line made some manufacturing processes significantly more efficient, some manufacturers looked for new ways to improve accuracy and lower costs.
By mid-century, assembly lines were in use in many manufacturing industries across the world.
Thus, as various forms of automation matured over the course of the 20th century, manufacturers incorporated them into their processes. Gradually, automated tools began to take over simple, repetitive tasks. Over time, the amount of automation on assembly lines increased significantly.
While there are examples of fully automated assembly lines, most assembly lines are mixes of humans and automated labor. Humans perform the assemblies and tasks that are too senstitive or complex for machines, while machines to the work that’s too repetitive, dangerous, or error-prone for humans.